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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 299628 $ -->
<refentry xml:id="function.imagecolorset" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>imagecolorset</refname>
<refpurpose>Set the color for the specified palette index</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>void</type><methodname>imagecolorset</methodname>
<methodparam><type>resource</type><parameter>image</parameter></methodparam>
<methodparam><type>int</type><parameter>index</parameter></methodparam>
<methodparam><type>int</type><parameter>red</parameter></methodparam>
<methodparam><type>int</type><parameter>green</parameter></methodparam>
<methodparam><type>int</type><parameter>blue</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>alpha</parameter><initializer>0</initializer></methodparam>
</methodsynopsis>
<para>
This sets the specified index in the palette to the specified
color. This is useful for creating flood-fill-like effects in
palleted images without the overhead of performing the actual
flood-fill.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
&gd.image.description;
<varlistentry>
<term><parameter>index</parameter></term>
<listitem>
<para>
An index in the palette.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>red</parameter></term>
<listitem>
<para>
Value of red component.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>green</parameter></term>
<listitem>
<para>
Value of green component.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>blue</parameter></term>
<listitem>
<para>
Value of blue component.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>alpha</parameter></term>
<listitem>
<para>
Value of alpha component.
</para>
<para>
&version.trunk.after.53;
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.void;
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>&version.trunk.changelog;</entry>
<entry>
The <parameter>alpha</parameter> parameter was added.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>imagecolorset</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
// Create a 300x100 image
$im = imagecreate(300, 100);
// Set the background to be red
imagecolorallocate($im, 255, 0, 0);
// Get the color index for the background
$bg = imagecolorat($im, 0, 0);
// Set the backgrund to be blue
imagecolorset($im, $bg, 0, 0, 255);
// Output the image to the browser
header('Content-type: image/png');
imagepng($im);
imagedestroy($im);
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>imagecolorat</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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